Door operator



FIG. 1 is a side elevational view of a door operator, showing my newdesign, the opposite side being a mirror image thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is an enlarged end elevational view, the opposite end being amirror image thereof; and,

FIG. 4 is a bottom plan view.

The ornamental design for a door operator, as shown and described. 